public class Example12_1 {
    public static void main(String args[]) { //主线程
        SpeakElephant speakElephant;
        SpeakCar speakCar;
        speakElephant = new SpeakElephant();      //创建线程
        speakCar = new SpeakCar();                //创建线程
        speakElephant.start();                          //启动线程
        speakCar.start();                         //启动线程
        for (int i = 1; i <= 15; i++) {
            System.out.print("主人" + i + "  ");
        }
    }
}
